Yeah! This one is not to difficult "Ankh-Morpork's underworld, which was so big that the overworld floated around on top of it like a very small hen trying to mother a nest of ostrich chicks, already had Big Dave, Fat Dave, Mad Dave, Wee Davey, and Lanky Dai. Everyone had to find their niche."

What would good do if evil didn't exist, and what would the earth look like if all the shadows disappeared?